CN202253471U

CN202253471U - Tandem device of alternative-current light-emitting diode

Info

Publication number: CN202253471U
Application number: CN2011203361323U
Authority: CN
Inventors: 张家成
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-08
Filing date: 2011-09-08
Publication date: 2012-05-30
Anticipated expiration: 2021-09-08

Abstract

The utility model provides a tandem device of an alternative-current light-emitting diode, comprising a first LED (Light-emitting Diode) tandem group, a second LED tandem group, a third LED tandem group, a fourth LED tandem group and a fifth LED tandem group, a constant current IC (Integrated circuit) and an alternative-current power supply, wherein each LED tandem group is formed by connecting a plurality of light-emitting diodes in series, and anode and cathode two ends are formed on each LED tandem group; the cathode of the first tandem group is connected with the anode of the second tandem group; the cathode of the second tandem group is connected with the anode of the third tandem group; the cathode of the third tandem group is connected with the anode of the fourth tandem group; the cathode of the fourth tandem group is connected with the cathode of the first tandem group and the anode of the second tandem group; the anode of the fifth tandem group is connected with the cathode of the second tandem group and the anode of the third tandem group; the cathode of the fifth tandem group is connected with the anode of the first tandem group; the constant current IC is connected with the cathode of the third tandem group and the anode of the fourth tandem group; one end of the alternative-current power supply is connected with the cathode of the fifth tandem group and the anode of the first tandem group, and the other end of the alternative-current power supply is connected with the constant current IC. According to the utility model, each tandem group not only has a function of emitting light, but also has an aim of rectifying.

Description

AC LED serial device

Technical Field

The utility model relates to an alternating current light emitting diode serial device which has simple structure and low cost and can effectively reduce the power consumption.

Background

Unlike fluorescent tubes that fluoresce by electron beams, Light Emitting Diodes (LEDs) use the photoelectric effect produced by junction diodes to emit light. The wavelength of light waves generated by the light emitting diode is stable, and the brightness of the light waves is easy to control through current. In addition, the led has the characteristics of cold light, small volume and power saving, and the service life is 10 times longer than that of the fluorescent tube, so it is becoming the mainstream of the market.

In a conventional led string device, an ac power supply supplies a current, which is first rectified by a bridge rectifier circuit and then flows through a plurality of leds, so that the leds can be turned on and emit light in both positive and negative periods of the ac power supply.

However, in the led serial device design, since the led overheating problem affects the service life of the led after long-time use, how to avoid power consumption and reduce the circuit elements of the led, thereby reducing the overall production cost and the miniaturization of the module, which is a problem to be solved in the current led lamp field.

Disclosure of Invention

The present invention is directed to an ac led string device with simple structure, low cost and low power consumption.

To achieve the above object, the present invention provides an ac LED string device, which comprises a first to fifth LED string groups, a constant current IC, and an ac power supply, wherein each LED string group comprises a plurality of LEDs connected in series, and has a positive and a negative end; the cathode of the first LED serial group is connected with the anode of the second LED serial group; the cathode of the second LED serial group is connected with the anode of the third LED serial group; the negative electrode of the third LED serial group is connected with the positive electrode of the fourth LED serial group; the cathode of the fourth LED serial group is connected with the cathode of the first LED serial group and the anode of the second LED serial group; the positive electrode of the fifth LED serial group is connected with the negative electrode of the second LED serial group and the positive electrode of the third LED serial group, the negative electrode of the fifth LED serial group is connected with the positive electrode of the first LED serial group, the constant current IC is connected with the negative electrode of the third LED serial group and the positive electrode of the fourth LED serial group, one end of the alternating current power supply is connected with the negative electrode of the fifth LED serial group and the positive electrode of the first LED serial group, and the other end is connected with the constant current IC.

In practice, a current limiting resistor is included to modulate the current.

The beneficial technical effects of the utility model reside in that, first ~ fifth LED tandem group not only has provides luminous function, more has the purpose of rectification concurrently, so can effectively reduce overall structure electronic component's quantity, make cost reduction, reduce the structure space, more can reduce the power of consumption because of electronic component reduces.

For further understanding of the present invention, the following preferred embodiments are illustrated in the drawings and the figures, and the detailed description of the specific components and the functions achieved by the present invention will be described as follows:

drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

[ description of main element symbols ]

1 first LED string group

2 second LED string group

3 third LED string group

4 fourth LED serial group

5 fifth LED string group

6 constant current IC

7 AC power supply

8 current limiting resistor

Detailed Description

Referring to fig. 1, an embodiment of an ac LED string device of the present invention is composed of first to fifth LED string sets 1 to 5, a constant current IC6 and an ac power supply 7.

Each LED serial group 1-5 comprises a plurality of LEDs connected in series, and is formed with a positive electrode and a negative electrode. Wherein, the cathode of the first LED serial group 1 is connected with the anode of the second LED serial group 2; the cathode of the second LED serial group 2 is connected with the anode of the third LED serial group 3; the negative electrode of the third LED serial group 3 is connected with the positive electrode of the fourth LED serial group 4; the negative electrode of the fourth LED serial group 4 is connected with the negative electrode of the first LED serial group 1 and the positive electrode of the second LED serial group 2; the positive electrode of the fifth LED string group 5 is connected to the negative electrode of the second LED string group 2 and the positive electrode of the third LED string group 3, and the negative electrode of the fifth LED string group 5 is connected to the positive electrode of the first LED string group 1.

The constant current IC6 is connected to the negative electrode of the third LED string group 3 and the positive electrode of the fourth LED string group 4.

One end of the alternating current power supply 7 is connected with the cathode of the fifth LED string group 5 and the anode of the first LED string group 1, and the other end is connected with the constant current IC 6.

Therefore, in the implementation, through the connection relationship of the first to fifth LED string groups 1 to 5, a function similar to bridge rectification can be formed, and the current design must depend on a bridge rectifier circuit for rectification, so the first to fifth LED string groups 1 to 5 of the present invention not only have the function of providing light emission, but also have the purpose of rectification, so as to effectively reduce the number of electronic components in the whole structure, reduce the cost, reduce the structural space, and reduce the power consumption due to the reduction of the electronic components.

In addition, in the embodiment, the ac led string device further includes a current limiting resistor 8 for modulating the current.

The foregoing is directed to embodiments of the present invention and techniques for implementing the same, and many modifications and variations are possible in light of the above teaching or teaching, and it is intended that all such modifications and variations be included within the scope of the invention.

In view of the above, the present invention can achieve the intended purpose of the invention, and provides an ac led serial device with industrial and practical value.

Claims

1. An ac led string device, comprising:

the LED array comprises a first LED array group, a second LED array group, a third LED array group and a fourth LED array group, wherein each LED array group is formed by connecting a plurality of light emitting diodes in series and is provided with a positive end and a negative end; wherein,

the negative electrode of the first LED serial group is electrically connected with the positive electrode of the second LED serial group; the cathode of the second LED string group is electrically connected with the anode of the third LED string group; the negative electrode of the third LED string group is electrically connected with the positive electrode of the fourth LED string group; the negative electrode of the fourth LED string group is electrically connected with the negative electrode of the first LED string group and the positive electrode of the second LED string group; the anode of the fifth LED serial group is electrically connected with the cathode of the second LED serial group and the anode of the third LED serial group, and the cathode of the fifth LED serial group is electrically connected with the anode of the first LED serial group;

a constant current IC electrically connected to the cathode of the third LED string group and the anode of the fourth LED string group;

and one end of the alternating current power supply is electrically connected with the negative electrode of the fifth LED serial group and the positive electrode of the first LED serial group, and the other end of the alternating current power supply is connected with the constant current IC.

2. An ac led string device according to claim 1, including a current limiting resistor for modulating current.